If you got the orange color case auto key programmer, it is called X300 Pro3. and the green color case programmer is marked Key Master. They are the same device. The only difference is that the orange one adds more Chinese models.

OBDSTAR X300 by OBDSTAR Company features with the immobiliser key programming function of SKP900,as well as new function e.g. Odometer adjustment, EEPROM/PIC and OBDII.Its design is fully based on industrial standard, for example, it is designed with bilateral keyboards which make it easy to operate, besides its appearance is processed by special material and reaches to the shockproof level.

Customer 1: For the price and its function over SKP900 looks to be the better buy mileage is extra bonus, more money & something different. (New story’s) obd2 scanning is limited but extra bonus on rewriting vin # on donor Ecu.

Customer 2: I have bought 2 of there newest programmer (Key Master X300 Pro) claim to have the same program as the SKP900. Not true it lacks the newest protocol, all thou the F100 does have the newest protocol.
OBDSTAR X300 PRO3 Advantages:
The main unit system adopts ARM high speed chip to keep it running fast, stable and anti-jamming.
Upgrade via the SD card at any moment.
Modern design and high-definition screen realize the integration of automotive industry and electronic information technologies and make auto diagnosis and key programming easier, practical and economical. Integrity structure design makes it crack resistance, shock resistance and durable.
Industrial design ensures the tool works stably under the tough environment, such as high and low temperatures.